(In reply to comment #5)
> It'll help if you can test with 2.6.31-rc9, I've fixed a resume issue which
> maybe relate to your problem.
Just checked rc9. No change in behavior, still broken.
It's on a Samsung NC10, so it's a pretty recent and well-sold machine.
Also checked w/o KMS again - hibernate works fine with that, even with 2.8.1.